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Features

New York City's Twenty-five Foot Map, Scholarship for Belgian Students in American Universities and more

Includes editorials on
Blockade by Submarine
The War of Attrition (Naval)
 

By Charles W. Person

The Panama-Pacific International Exposition at Night

How the Illuminating Engineer Uses Light Decoratively

By Hamilton M. Wright

Valuable Products Recovered from Coke Oven Gases

The Enormous By-product Coke Plant at Gary, Indiana

The Death of Cecil Peoli, Prof. C. W. MacCord Dead and more

Longitudes by Wireless Telegraphy

By F. B. Littell

Saving Eight Million Tons of Coal a Year

A Hydro-Electric Development That Uses a Head of 4,000 Feet

A New Searchlight for the United States Navy

By Herbert T. Wade

The Sound Wheel, a Novel Wireless Detector, The Albessard Aeroplane and more

By the Berlin Correspondent of the Scientific American

Animal Life in a Zoo

The Modern Way of Keeping Wild Animals

By Alexander Pope

A Clock Built of Straw, Vacuum System of Gasoline Feed and more

Continuous Aviation Competitions, The Current Supplement

Departments

  • Departments

    Correspondence - April 24, 1915

  • Recently Patented Inventions - April 24, 1915

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